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A mixed rare earth-transition element doped up-conversion laser crystal and its preparation method

A transition element, mixed rare earth technology, applied in lasers, crystal growth, laser parts and other directions, can solve problems such as low efficiency, achieve wide emission spectrum, high thermal conductivity, and achieve the effect of laser output

Active Publication Date: 2021-07-02
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]Upconverting luminescence is common in many activator-sensitizer systems, but is usually less efficient

Method used

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  • A mixed rare earth-transition element doped up-conversion laser crystal and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mixed rare earth-transition element doped up-conversion laser crystal, the up-conversion laser crystal is graphene quantum dots: Yb 3+ / Er 3+ :NaYF 4 / ZrF 4 ; The up-conversion laser crystal includes a mixed crystal of yttrium tetrafluoride sodium and zirconium tetrafluoride in a molar ratio of 100:1 as a matrix, doped with 2.8% (mole percentage, the same below) of Yb 3+ As a sensitizer, doped with 1.2% Er 3+ As an activator, 0.018% graphene quantum dots were doped.

[0029] Its preparation method comprises the following steps:

[0030] (1) monolayer graphene oxide is added in polyvinyl alcohol aqueous solution to make the graphene oxide dispersion that concentration is 6mg / mL, add the polymethylpyrrolidone of ytterbium oxide, erbium oxide and 4 times monolayer graphene oxide quality, After the dispersion is uniform, transfer to the crucible, place the crucible in a muffle furnace for calcination, wash the solid mixture in the crucible with hot water at 75°C, and d...

Embodiment 2

[0036] Mixed rare earth-transition element doped up-conversion laser crystal, the up-conversion laser crystal is graphene quantum dots: Yb 3+ / Er 3+ :NaYF 4 / ZrF 4 ; The up-conversion laser crystal includes a mixed crystal of sodium tetrafluoroyttrium and zirconium tetrafluoride with a molar ratio of 100:0.5 as a host, doped with 1% Yb 3+ As a sensitizer, doped with 1.5% Er3+ As an activator, 0.005% graphene quantum dots were doped.

[0037] Its preparation method comprises the following steps:

[0038] (1) Add single-layer graphene oxide to polyvinyl alcohol aqueous solution to obtain a graphene oxide dispersion with a concentration of 2 mg / mL to 10 mg / mL, add ytterbium oxide, erbium oxide and 3 to 5 times the mass of single-layer graphene oxide After the polymethylpyrrolidone is uniformly dispersed, it is transferred to a crucible, and the crucible is placed in a muffle furnace for calcination, and the solid mixture in the crucible is washed with hot water at 60-90°C, an...

Embodiment 3

[0044] Mixed rare earth-transition element doped up-conversion laser crystal, the up-conversion laser crystal is graphene quantum dots: Yb 3+ / Er 3+ :NaYF 4 / ZrF 4 ; The up-conversion laser crystal includes a mixed crystal of sodium tetrafluoroyttrium and zirconium tetrafluoride in a molar ratio of 100:5 as a matrix, doped with 5% Yb 3+ As a sensitizer, doped with 0.5% Er 3+ As an activator, 0.03% graphene quantum dots were doped.

[0045] Its preparation method is identical with embodiment 2.

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Abstract

An up-conversion laser crystal doped with mixed rare earth-transition elements and a preparation method thereof, wherein the up-conversion laser crystal is a graphene quantum dot: Yb 3+ / Er 3+ :NaYF 4 / ZrF 4 The up-conversion laser crystal includes a mixed crystal of sodium tetrafluoroyttrium and zirconium tetrafluoride with a molar ratio of 100:(0.5-5) as a matrix, doped with 1-5% Yb 3+ As a sensitizer, doped with 0.5-1.5% Er 3+ As an activator, 0.005-0.03% graphene quantum dots are doped. The up-conversion laser crystal of the present invention uses a mixed crystal of sodium tetrafluoroyttrium and zirconium tetrafluoride as a matrix, has high stability, and can effectively carry Er 3+ The activator, the incorporation of zirconium tetrafluoride improves the mechanical properties and chemical stability of the crystal; Yb 3+ As a sensitizer, it can greatly improve the photon absorption efficiency; Er 3+ As an activator, the energy level difference between the excited energy level and the ground state is small, which can produce a practical and effective up-conversion emission process; at the same time, it is doped with graphene quantum dots, which has a wider emission spectrum and higher thermal conductivity. It is beneficial to realize high-energy laser output.

Description

technical field [0001] The invention relates to crystal materials, and relates to a mixed rare earth-transition element doped up-conversion laser crystal and a preparation method thereof. Background technique [0002] The process of absorbing energy in a certain way in a material and converting it into light radiation non-equilibrium radiation is called luminescence. The material emits light after absorbing high-energy radiation, and the emitted photon energy is generally lower than that of the excitation radiation. The substance with this light-emitting behavior is called a luminescent substance, also known as a phosphor, phosphor or luminescent body-Luminophor or Phosphor. According to different excitation sources, there are several types of luminescence: photoluminescence, radioluminescence, X-ray luminescence, electroluminescence, cathodoluminescence, thermoluminescence, acoustoluminescence, chemiluminescence, bioluminescence and triboluminescence. According to the comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B15/00C30B29/12H01S3/16
CPCC30B15/00C30B29/12H01S3/1601H01S3/1645
Inventor 李东振王东海徐晓东王晓君刘坚
Owner XUZHOU NORMAL UNIVERSITY